Grist mill



(No Model.) 2 Sheets-Sheet 1.

0. J. BLUM. GRIST MILL.

No. 313,166. Patented Mar. 3, 1885.

- MENTOR N. PHEfls, PlloioLdhogrunlmr. Washingluu.

.dttorney 8 (No Model.) 2 Sheets-Sheet 2.

G. J. BLUM.

GRIST MILL. No. 313,166. Patented Mar. 3. 1885..

Attorney? llNiTE STATES arnnr trier.

GRlST lVlILL.

SPECIFICATION forming part of Letters Patent No. 313,166, dated March3,1885.

Application filed October 15, 1884.

To all whom it may concern.-

Be it known that I, OHRISTAN J. BLUM, a citizen of the United States,residing at Salem, in the county of Forsyth and State of North Carolina,have invented a new and useful Improvement in Grist-Mills, of which thefollowing isaspecification, reference being had to the accompanyingdrawings.

My invention relates to grist'mills; and it consists in the constructionand novel arrangement of parts, as will be hereinafter fully de scribed,and particularly pointed out in the claims.

In the drawings, Figure l is a side elevation of a grist-mill embodyingmy invention. Fig. 2 is a vertical central sectional view of the same.Fig. 3 is a top plan view, the inclosing-hoop being shown in horizontalsection.

Referring by letter to the accompanying drawings, A designates the frameof the gristmill, and B the hoop which incases the run of stones 0 andD, both of which in my improved mill are runners, the bed stone 0running in a direction opposite to the runner D, which arrangementincreases the grinding power of the mill over those wherein the bedstoneis stationary.

E designates the usual bridge-tree, which is provided with the step Ffor the toe of the spindle F. The upper stone or runner, D,-is providedwith the usual balance-rynd, M, by which said stone D is poised on thespindle F. A central vertical stationary sleeve, H, is supported in theupper portion of the frame A by diagonal timbers H, which are suitablybraced to give the structure the necessary strength. A secondbridge-tree, I, is pro- ,vided in this construction, and this bridgetrecI is provided with a hollow step, I, for the spindle H of the lowerstone, (3. The spindle H is constructed in the form of a hollow sleeve,and the spindle F passes up through the hollow spindle H The hollowspindle I-I projects below the stationary sleeve H, and is providedabove the loridgetree I with a pulley, H which is run by a band leadingfrom the upper pulley, J, on a shaft, J, journaled in bearingsprojecting from the frame A at one side thereof. The spindle F isprovided near its lower end with a band wheel or pulley, G, which isdriven by a belt, G, running from the lower pulley, G on the verticalshaft Gfi journaled in bearings projecting from the frame A at the sidedirectly opposite (No model.)

the vertical shaft J. The shafts J and G are driven in oppositedirections by belts con: nected to their driving-pulleys K and L. Iprovide the lower stone with an annular ext mding ring, N, whichrevolves with the stone, and which is provided with tangential sweeps N.An opening, B, is made in one side of the hoop or case B, communicatingwith the upper end of the discharge-spout B". The flour, as it issuesfrom between the inillstones onto the ring, is swept by the rotation ofthe lower stone, being guided by the sweeps N to the outer edge of thering, and through the opening B of the case into the dischargespout. Theupper stone is provided with suction fans or wings P, which as the stonerevolves have a tendencyto create a vacuum in the case B by forcing theair out through the large opening left in the upper side of the case, asat B, Fig. 2. The air, as it is forced upwardly out of the case, carriesthe dust and dirt with it, and the constant draft thus pro duced in thecase cools the flour, as will be very readily understood.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent of the United States, is

l. The combination of the inclosingcase having an opening in the upperside and a discharge-opening, the upper runner, and the lower runner,said runners being adapted to revolve in opposite directions, the saidupper runner being provided with wings for forcing a current of airupwardly through and out of the case, and the lower runner beingprovided with an extended annular ring having tangentially-arrangedsweeps for forcing the flour outwardly through the dischargeopening inthe case, substantially as described.

2. The combination of the inclosing-case having a discharge opening, theupper runner, and the lower runner, said runners being adapted torevolve in opposite directions, the lower runner being provided with anextended annular ring having tangentially-arranged sweeps for forcingthe flour outward through the discharge-opening in thecase,substantially as described.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in presence of two witnesses.

OHRISTAN JEROME BLUM.

IVitnesses:

WM. BARROW, F. E. KEEH N.

